About certain people looking at you and then obviously going for their bags, belongings and kids as if you are going to 'snatch' their stuff,
well a lady did that to me in Madrid and it just made me laugh! I luuuuuuv Madrid and even though i've been conned by bar men, coaxed into ordering things i don't want, cheated with bills 10 x what i should be paying i still Luuuuuuuuuuuv Spain.(no one gets away with this! not with me!)
As for the Northerners being colder than Southerners - I just don't know! While in Andalucian towns searching for olive oil I found that some people would run into their homes and bolt the doors and then peek through windows! and some people stare and cross to the other side of the road, and continue to stare!
(all part of the fun as far as I'm concerned) But then a lady at an olive oil factory was majestic in welcoming us and was so joking and friendly, she was just exposed more to foreigners, that's all it is at the end of the day. .... but Andalucia is a gem!
As for the northern parts i've had no problems, but many of my Spanish friends from Madrid would certainly act differently and cautiously while in Basque regions and Barcelona, but only because they would be treated unfairly, once their accent would be established.
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So at the end of the day we are all just sharing our opinions and experiences, and these are ALL valid, I think my sweeeping generalisation comment would be; nothing wrong with opinions and always arrive at a place with an open mind
..by a very suspicious looking, not to be trusted desperado type olive oil in guitar case Londoner.
Whose next?